The altitude note lives on a scrap

Processing time changes with elevation. The number is not hard. Keeping the number next to the batch is.

Croft holds the note beside the jars. It does not certify the process. Follow tested USDA, Extension, or NCHFP guidance. The ledger is the record of what you did, not a badge that you did it safely.

If you put food up this week, log the batch before the lids cool. The frost calendar can wait.